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Tensor Network-Encrypted Physical Anti-counterfeiting Passport for Digital Twin Authentication.

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  • 1Shenzhen Institute of Artificial Intelligence and Robotics for Society (AIRS), The Chinese University of Hong Kong, Shenzhen, Shenzhen, Guangdong 518172, China.

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Summary

Researchers developed a micro-scale label using laser writing to create a secure physical passport. This label encrypts user data into 3D structures, offering high-density storage and physical unclonable functions for robust digital authentication.

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authentication securitydigital twindirect laser writingphysical anti-counterfeitingquantum dotstensor network

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Area of Science:

  • Materials Science and Engineering
  • Computer Science and Engineering
  • Cybersecurity

Background:

  • The proliferation of the Internet of Things (IoT) ecosystem necessitates advanced data interaction and authentication methods.
  • Existing authentication systems face challenges in securely bridging the physical and digital realms.
  • The demand for secure digital identities and data protection is rapidly increasing with digitalization trends.

Purpose of the Study:

  • To develop a novel micro-scale label functioning as a secure passport between physical objects and their digital counterparts.
  • To implement a robust authentication system leveraging encrypted 3D geometric structures and physical unclonable functions (PUFs).
  • To achieve high data storage density for comprehensive user information, including sensitive biometric data.

Main Methods:

  • Direct laser writing was employed to fabricate micro-scale labels with encrypted 3D geometric structures.
  • A tensor network was utilized for encrypting user information into these geometric patterns.
  • A two-step printing methodology involving doped quantum dots was applied to encode random fluorescence, establishing PUFs.

Main Results:

  • A data storage density of 10^5 bits/mm^2 was achieved, enabling the storage of extensive encrypted physical world data.
  • The developed system demonstrated successful authentication through computer vision-based decryption of the 3D geometric structures.
  • The PUF-assisted codes ensured a strong correlation with user privacy data, preventing illegal transfer of authentication information.

Conclusions:

  • The micro-scale laser-written passport offers an ultra-high security level and convenience for authentication.
  • This technology effectively overcomes the challenge of illegal transfer of authentication information.
  • The printed passport holds significant potential for future digital twin authentication, including personal identity, certificates, and vehicle networking.